Question

If
$x = \frac{2k}{1 + k ^{2} }$
and
$y = \frac{1 - {k}^{2} }{1 + k ^{2} }$
show that x^2 + y^2 = 1​

Answer 1

Answer:

k=3. 5. 2k. = 5. 23. +. 5. 24. +. 5. 25. + ···. This is a geometric series with ratio r = 1/2. Since |r| < 1, the series is convergent. The first term is a ...